CN115414648B - Football evaluation method and football evaluation system based on motion capture technology - Google Patents
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Abstract
The application discloses a football evaluation method and a football evaluation system based on a motion capture technology. The football evaluation method based on the motion capture technology comprises the following steps: acquiring track information and football information of the athlete captured by the football evaluation system when the athlete interacts with the football evaluation system; acquiring virtual imaging information generated by a football evaluation system when an athlete interacts with the football evaluation system; and evaluating and analyzing according to the track information of the athlete, the football information and the virtual imaging information. The football evaluation method can be used in smaller places, does not need devices such as barriers and the like to cooperate, and can detect various indexes of athletes only through virtual imaging information. The shooting evaluation, skill evaluation and physical ability evaluation are realized by a computer, the method has the advantages of objectivity and fairness, and the identification is realized based on an infrared tracking technology, so that the method is more accurate compared with the human eye identification in the prior art.
Description
Technical Field
The application relates to the technical field of football, in particular to a football evaluation method based on a motion capture technology and a football evaluation system based on the motion capture technology.
Background
In the prior art, when evaluating the skill state of a player, a huge field and a plurality of instruments are usually required, and the kicking precision and the strap skill of the player are evaluated through various instruments.
For example, by arranging a plurality of targets, the player can judge the accuracy of the player by kicking the football toward the targets, and the accuracy is judged only by whether the player can kick the targets, so that it is impossible to know whether the football kicks the center point of the targets.
By adopting the method in the prior art, on one hand, manpower and material resources are wasted, a wide field is required, the training in a smaller field is not suitable, and on the other hand, all observations are required to be observed through auxiliary personnel to obtain results, and the results are inaccurate.
It is therefore desirable to have a solution that solves or at least alleviates the above-mentioned drawbacks of the prior art.
Disclosure of Invention
The application aims to provide a football evaluating method based on a motion capture technology to at least solve one technical problem.
In one aspect of the present application, there is provided a football evaluating method based on a motion capture technology, the football evaluating method based on the motion capture technology including:
acquiring track information and football information of the athlete captured by the football evaluation system when the athlete interacts with the football evaluation system;
acquiring virtual imaging information generated by a football evaluation system when an athlete interacts with the football evaluation system;
and evaluating and analyzing according to the track information of the athlete, the football information and the virtual imaging information.
Optionally, the evaluating and analyzing according to the player track information, football information and virtual imaging information includes:
acquiring shooting Icon position information in the virtual imaging information;
acquiring football position information in football sport information;
and acquiring shooting precision information according to the football position information and the shooting Icon position information.
Optionally, the shooting accuracy information obtained according to the football position information and the Icon position information is obtained by adopting the following formula:
wherein,,
r i radius of Icon; d (D) s，i Is weight information;
the D is s，i The method is obtained by adopting the following formula:
wherein,,
(x′ 3 ，y′ 3 ，z′ 3 ) Representing the football in the plane of IconA projection position;
(x o，i ，y o，i ，z o，i ) Indicating the center position of Icon.
Optionally, the evaluating and analyzing according to the player track information, football information and virtual imaging information further includes:
acquiring the position information of a disc zone Icon in the virtual imaging information;
acquiring football position information in football sport information;
and obtaining the tape precision information according to the tape Icon position information in the virtual imaging information and the football position information in the football sport information.
Optionally, the obtaining the band precision information according to the band Icon position information in the virtual imaging information and the football position information in the football information includes:
judging whether the position of the football position information is overlapped with the position information of the disc strip Icon at any time point in the preset time or not in the preset time, if so, then
The overlay accuracy information is acquired as the tape accuracy information.
Optionally, the evaluating and analyzing according to the player track information, football information and virtual imaging information further includes:
acquiring passing Icon position information in the virtual imaging information;
acquiring football position information and football track information in football information;
and acquiring pass evaluation information according to the position information of the disc belt Icon, the football position information and the football motion track information in the virtual imaging information.
Optionally, the acquiring the pass evaluation information according to the disc band Icon position information, the football position information and the football motion track information in the virtual imaging information includes:
acquiring the actual motion speed of the football according to the football motion track information;
acquiring the accuracy of the football direction according to the position information of the coil Icon, the football position information and the football track information;
acquiring the accuracy of the passing speed according to the actual motion speed of the football and a preset optimal speed;
and acquiring pass evaluation information according to the pass speed accuracy and the football direction accuracy.
Optionally, the evaluating and analyzing according to the player track information, football information and virtual imaging information further includes:
acquiring physical ability Icon position information in the virtual imaging information;
acquiring track information of athletes;
acquiring the actual speed information and the actual movement distance information of the athlete according to the athlete track information and the physical ability Icon position information;
obtaining a physical stamina evaluation table, wherein the physical stamina evaluation table comprises a plurality of pieces of preset athlete speed information, a plurality of pieces of preset distance information, speed value information and distance value information, each piece of preset athlete speed information corresponds to one piece of speed value information, and each piece of preset distance information corresponds to one piece of distance value information;
acquiring speed value information corresponding to preset athlete speed information which is the same as the athlete actual speed information;
acquiring distance value information corresponding to preset distance information which is the same as the actual distance information of the athlete;
and acquiring physical energy value information according to the acquired speed value information and the distance value information.
Optionally, the evaluating and analyzing according to the player track information, football information and virtual imaging information further includes:
and acquiring comprehensive evaluation information of the athlete according to the shooting precision information acquired many times, the disc belt precision information acquired many times, the pass evaluation information acquired many times and the physical ability value information acquired many times.
The application also provides a football evaluation system based on the motion capture technology, which comprises a trackable football, trackable football shoes, a projection system, an infrared tracking system and a master controller; the master controller is respectively connected with the projection system and the infrared tracking system; wherein,,
the projection system is used for projecting virtual imaging information;
the infrared tracking system is used for tracking the position of the trackable football, the trackable football shoes and virtual imaging information and transmitting the tracked information to the master controller;
and the master controller is used for carrying out evaluation analysis by adopting the football evaluation method based on the motion capture technology according to the acquired information.
Advantageous effects
The football evaluation method based on the motion capture technology can be used in a small place, and can detect various indexes of athletes, such as shooting indexes, skill indexes, physical performance indexes and the like, only by virtual imaging information without matching devices such as target positions, barriers and the like. The shooting evaluation, skill evaluation and physical ability evaluation are realized by a computer, the method has the advantages of objectivity and fairness, and the identification is realized based on an infrared tracking technology, so that the method is more accurate compared with the human eye identification in the prior art.
Drawings
Fig. 1 is a system schematic diagram of a football evaluation method based on motion capture technology according to an embodiment of the application.
FIG. 2 is a system diagram of a football evaluation system based on motion capture technology according to an embodiment of the application.
FIG. 3 is another system diagram of a football evaluation system based on motion capture technology according to an embodiment of the application.
Reference numerals:
1. a target sphere; 2. physical ability projection means; 3. a physical performance motion capture device; 4. football trainers; 5. a wall body.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application become more apparent, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the application. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Fig. 1 is a system schematic diagram of a football evaluation method according to an embodiment of the application.
The football evaluation method based on the motion capture technology as shown in fig. 1 comprises the following steps:
step 1: acquiring track information and football information of the athlete captured by the football evaluation system when the athlete interacts with the football evaluation system;
step 2: acquiring virtual imaging information generated by a football evaluation system when an athlete interacts with the football evaluation system;
step 3: and evaluating and analyzing according to the track information of the athlete, the football information and the virtual imaging information.
The football evaluation method based on the motion capture technology can be used in a small place, and can detect various indexes of athletes, such as shooting indexes, skill indexes, physical performance indexes and the like, only by virtual imaging information without matching devices such as target positions, barriers and the like.
In this embodiment, performing evaluation analysis according to the player track information, the football information, and the virtual imaging information includes:
acquiring shooting Icon position information in the virtual imaging information;
acquiring football position information in football sport information;
and acquiring shooting precision information according to the football position information and the shooting Icon position information.
In this embodiment, the shooting accuracy information obtained according to the football position information and the Icon position information is obtained by adopting the following formula:
wherein,,
r i radius of Icon; d (D) s，i Is weight information;
the D is s，i The method is obtained by adopting the following formula:
wherein,,
(x′ 3 ，y′ 3 ，z′ 3 ) Representing the projection position of the football on the plane of Icon;
(x o，i ，y o，i ，z o，i ) Indicating the center position of Icon.
For example, in order to evaluate the index of the shooting accuracy, by shooting Icon position information in the virtual imaging information, different circles Icon randomly appear on three walls in front of, left of and right of the standardized virtual space, each Icon is respectively marked as a certain score according to the size, and isWhere N is the level at which the score is set, lambda i As the value of the Icon of the i-th rank, the larger the Icon area is, the lower the value is. Within a prescribed time t, the system will present various points Icon, the sum of all Icon being 100 points, and each Icon will be present for a short period of time, after which time it will be. Supposing that the score is lambda i Icon of m i Then the following is satisfied:
by calculating the central position of the football hitting the wall surface, i.e. the projection position (x 'of the football on the plane of Icon' 3 ，y′ 3 ，z′ 3 ) And the center position (x o，i ，y o，i ，z o，i ) Euclidean distance D between s，i Expressed as:
if D s，i Radius r smaller than Icon i We can then score Icon themselves as the score obtained for the shot. But the method is not sufficiently accurate, intuitively, the more concentrated the center of Icon, the higher the score should be, and therefore we pass through D s，i To calculate weights to obtain the final single shot score, the weights being set toObviously, the larger the distance is, the lower the weight is, and the normalization processing is performed so that the weight is between (0, 1). The shot accuracy R of the final soccer player can thus be calculated by how:
in this embodiment, performing evaluation analysis according to the player track information, the football information, and the virtual imaging information further includes:
acquiring the position information of a disc zone Icon in the virtual imaging information;
acquiring football position information in football sport information;
and obtaining the tape precision information according to the tape Icon position information in the virtual imaging information and the football position information in the football sport information.
In this embodiment, obtaining the band precision information from the band Icon position information in the virtual imaging information and the soccer position information in the soccer motion information includes:
judging whether the position of the football position information is overlapped with the position information of the disc strip Icon at any time point in the preset time or not in the preset time, if so, then
The overlay accuracy information is acquired as the tape accuracy information.
For example, to evaluate an indicator of accuracy of a ball, the Icon system presents a circle Icon of fixed size on the ground at intervals d, each Icon representing the goal that the player needs to pass through the ball, and a fixed time on the ground during which the non-ball passes through the Icon. All Icon are ordered into an arc representing the path of the player with the ball, each Icon having a radius r i According to the area size, a certain score lambda is corresponding i As with shooting practice, the larger the area, the lower the score. Assume that the center positions of all icons areThe ball-carrying accuracy is defined as the number of football players passing through the target along the ball-carrying route over a fixed time t. According to the projection position of the centre of the football on the ground +.>Calculation (x) I，i ，y I，i ，z I，i ) And (x' I，i ，y′ I，i ，z′ I，i ) Distance D between d，i ，
Similarly, to make the player pass through the center of Icon as much as possible, the present patent uses a weighted method to calculate the final score R of the player d ：
In this embodiment, performing evaluation analysis according to the player track information, the football information, and the virtual imaging information further includes:
acquiring passing Icon position information in the virtual imaging information;
acquiring football position information and football track information in football information;
and acquiring pass evaluation information according to the position information of the disc belt Icon, the football position information and the football motion track information in the virtual imaging information.
In this embodiment, acquiring pass evaluation information according to the disc Icon position information, the football position information, and the football trajectory information in the virtual imaging information includes:
acquiring the actual motion speed of the football according to the football motion track information;
acquiring the accuracy of the football direction according to the position information of the disc belt Icon, the football position information and the football motion track information;
acquiring the accuracy of the passing speed according to the actual motion speed of the football and a preset optimal speed;
and acquiring pass evaluation information according to the pass speed accuracy and the football direction accuracy.
For example, pass accuracy is related to the angle of pass and the force of pass, and is therefore calculated from the direction in which the football passes between the two circles Icon, as well as the speed of the football. Firstly, the direction of pass is calculated, and the total number of routes estimated at one time is assumed to be ((x) s，i ，y s，i ，z s，i )，(x e，i ，y e，i ，z e，i ) For effectively judging the accuracy of passing a ball, the present patent measures the accuracy of passing a ball direction by calculating the angular deviation between a football passing route and a predetermined passing route, and by collecting the position (x f，i ，y f，i ，z f，i ) We calculate the pass direction accuracy by the cosine of the angleR a ：
In addition, we budget an optimal speed v for each route, so we determine the speed accuracy R of the pass by calculating the deviation between the true speed and the optimal speed v ：
Final pass accuracy R p Is the product of pass direction accuracy and speed accuracy:
R p ＝R a ·R v
notably, time t, optimal speed v, and allAnd->Can be obtained by presetting.
In this embodiment, performing evaluation analysis according to the player track information, the football information, and the virtual imaging information further includes:
acquiring physical ability Icon position information in the virtual imaging information;
acquiring track information of athletes;
acquiring the actual speed information and the actual movement distance information of the athlete according to the athlete track information and the physical ability Icon position information;
obtaining a physical stamina evaluation table, wherein the physical stamina evaluation table comprises a plurality of pieces of preset athlete speed information, a plurality of pieces of preset distance information, speed value information and distance value information, each piece of preset athlete speed information corresponds to one piece of speed value information, and each piece of preset distance information corresponds to one piece of distance value information;
acquiring speed value information corresponding to preset athlete speed information which is the same as the athlete actual speed information;
acquiring distance value information corresponding to preset distance information which is the same as the actual distance information of the athlete;
and acquiring physical energy value information according to the acquired speed value information and the distance value information.
For example, the physical ability of a football player is the basis of a well-tied football, typically calculated by running distance, and this patent measures the physical ability of the player by calculating the running distance of the player within the test time t. The motion trail of the athlete can be acquired through the Optigrack motion capture system, the acquisition frequency can reach 60HZ, and the data point set acquired in the time t is assumed to beD is the total number of points. Running total distance D is:
because of the data collected by the left and right feet, there may be differences, we directly average the final distance to the left and right foot running distance, i.e.:
wherein D is sum For the final calculated running distance, D L And D R The movement distance of the left foot and the right foot respectively.
In this embodiment, each of the above-mentioned tests (physical ability, shooting, passing, etc.) may be repeated, and after a plurality of tests, a comprehensive evaluation may be performed by the test results, which represents the physical ability level, shooting level, and passing level of the athlete on the one hand, and also reflects the mental quality of the user on the other hand.
Specifically, in this embodiment, performing evaluation analysis according to the player track information, football information, and virtual imaging information further includes:
and acquiring comprehensive evaluation information of the athlete according to the shooting precision information acquired many times, the disc belt precision information acquired many times, the pass evaluation information acquired many times and the physical ability value information acquired many times.
For example, in the present application we propose to evaluate the psychological diathesis of an athlete using the stability of the athlete in terms of technical metrics, whereas stability is measured by the variance of multiple shots, dribbling and passing. Define shot stability, dribbling stability and pass stability, denoted as W respectively s ，W d ，W p . Assume that the N shots perform asThe calculation is performed by the following formula:
wherein the method comprises the steps ofThe average value of N shooting achievements is:
similarly, we can pass the ball through N timesTo calculate the ball bearing stability and pass stability, i.e.:
wherein the method comprises the steps ofAnd->Average of ball-carrying and pass results for N times respectively:
the psychological diathesis of the final football player can be measured through the total stability, weights of the preset shooting stability, the ball-carrying stability and the pass stability are respectively alpha, beta and gamma, and then the total psychological diathesis W is scored as follows:
W＝αW s +βW d +γW p 。
the application also provides a football evaluation system based on the motion capture technology, which comprises a trackable football, trackable football shoes, a projection system, an infrared tracking system and a master controller; the master controller is respectively connected with the projection system and the infrared tracking system; wherein,,
the projection system is used for projecting virtual imaging information;
the infrared tracking system is used for tracking the position of the trackable football, the trackable football shoes and virtual imaging information and transmitting the tracked information to the master controller;
and the master controller is used for carrying out evaluation analysis by adopting the football evaluation method according to the acquired information.
In the embodiment, the infrared tracking system adopts an OptiTrack system, optiTrack is a set of optical system for realizing high-precision three-dimensional reconstruction of the marking points, the main hardware is an intelligent camera equipped with a processor, a high-precision marking point processing algorithm is built in, and three-dimensional information of a single marking point can be used for creating a rigid body to obtain six-degree-of-freedom data. The football evaluation method mainly utilizes the visual positioning function of OptiTrack, adds a layer of reflective material on the football expression, and adds a layer of reflective mark on the shoes of the athlete, thereby being capable of tracking the real-time positions of the human body and the football in the evaluation space. The main process comprises the following steps:
(1) Customized mark point fabrication
The interaction mode of the application is light capturing (reflective action capturing), not only through football, but also through football (reflective mark point is smeared on the surface) and own foot (square or round reflective mark point is stuck on the instep), and meanwhile, the interaction is carried out through football and heel immersion scene. By the innovative mode, an evaluator can evaluate the space without wearing the space, and various reports such as football technical skills can be accurately obtained.
(2) Calculation of spatial position
The method comprises the steps of establishing a space coordinate system through the relative position of a camera in space in an Optigrack motion capture system, establishing reflective mark points on a football and a foot as rigid body assets, acquiring images of an object at different angles at different positions through a plurality of infrared cameras by an infrared image analysis technology, and calculating the space coordinate information of the object by combining acquisition deviation of each camera on the same mark point information on the object. Optigrack derives three-dimensional coordinates of the mark points on the two feet of the football player and the mark points on the football, which are respectively (x) 1 ，y 1 ，z 1 )，(x 2 ，y 2 ，z 2 ) And (x) 3 ，y 3 ，z 3 )。
In this embodiment, the projection system is capable of projecting scene information as well as Icon position information.
In this embodiment, the overall controller can control the projection system to project and the infrared tracking system to track.
In this embodiment, the number of projection objects may be set according to the needs, and each physical projection object may appear simultaneously or in a time-sharing manner.
In this embodiment, the shape or area of each projection object may be set as required.
The application will now be described in further detail by way of example with reference to fig. 2 and 3, it being understood that this example does not constitute any limitation of the application.
Referring to fig. 2 and 3, in this embodiment, the wall surface can be used as a projection screen, and in testing football skills, pass is tested by touching the accuracy and speed of the icon points on the wall, as different icons appear on the wall in sequence. However, in skill testing, these icon appear simultaneously and the difficulty and score are different.
In this embodiment, the interaction mode of the application is light capturing (reflective action capturing), not only through football, but also through football (reflective material coated) and own foot (square or round reflective sticker is attached on instep), and interaction is performed by football and heel immersion scene. By the innovative mode, an evaluator can evaluate the space without wearing the space, and various reports such as football technical skills can be accurately obtained.
In this embodiment, the physical performance motion capture device and the skill motion capture device may be the same device, and the device uses an algorithm in which 8 motion capture cameras converge to one point to perform motion capture, reduces optimization of capture position shift due to field size adaptation, and captures a football running at high speed by reducing delay.
In the present embodiment, one example is as follows:
1. the technical scheme is as follows: the Unity program distributes corresponding quantity icons (physical ability projection objects) according to the ground range, and the icons (physical ability projection objects) are connected in series to form a route, wherein the icons are divided into score icons and obstacle icons, and in the same time, a user can trigger the score icons through football to avoid the obstacle icons, and the higher the score is, the better the physical ability technology is.
In this embodiment, the physical fitness projection device of the present application is a projector, and the physical fitness motion capture device is an OptiTrack whole body motion capture camera.
In this embodiment, the projector projects the scene in the Unity software onto 4 walls, the OptiTrack whole body motion capture camera captures the position of the real football in real time, the real football position information is transmitted to the Unity written program through the mobile software, the program instantiates the virtual football according to the real football position, the trigger icon is realized between the virtual football and icon through the collision detection, the triggering collision detection is equivalent to kicking a pattern, and the score is calculated. The football itself, because it is coated with reflective material, can be tracked and interacted with in real time.
In this embodiment, the technical scheme of shooting is as follows:
1. the technical scheme is as follows: the Unity program divides 9 areas according to the wall surface, the areas are sequentially provided with a low-difficulty shooting area, a medium-difficulty shooting area and a high-difficulty shooting area, the areas are sequentially provided with icon, in the same time, the higher the icon score on the football trigger wall is used by a user to indicate that the shooting technique is better,
the projector projects scenes in Unity software onto 4 walls, the OptiTrack whole-body motion capture camera captures the positions of real football in real time, the real football position information is transmitted to a Unity written program through the motion software, the program instantiates virtual football according to the real football positions, trigger icon is realized between the virtual football and icon through collision detection, the triggering collision detection is equivalent to kicking patterns, and the score is calculated.
In this embodiment, the pass technical scheme is as follows:
skill pass
1. Selection of pass: the icon appears on the three walls at the same time, the positions of the icon are different, the sizes of the icon are different, the corresponding scores are also different, and a user selects and triggers different icon to acquire different scores according to own technology
2. Judging pass: the score obtained by the icon in the kicking process is correct in passing, and the score obtained by the icon in the kicking process is incorrect
In this embodiment, the technical scheme of shooting is as follows:
with respect to skill shooting
1. The technical scheme is as follows: the Unity program is divided into 9 areas according to the wall surface, the areas are sequentially provided with a low-difficulty shooting area, a medium-difficulty shooting area and a high-difficulty shooting area, icon can appear in the areas at the same time, and in the same time, a user uses football to trigger that the higher the icon score on the wall is, the better the shooting technique is
In this embodiment, the physical fitness technical scheme is as follows:
agile ladder for physical ability
1. The technical scheme is as follows: ladder-shaped icons sequentially appear in the Unity program according to the middle part of the ground area, the ladder-shaped icons appear in a sequential circulation mode, the speed is faster and faster, and in the same time, the more the user uses football to trigger the ladder-shaped icons, the higher the score and the better the agility
2. When testing the agile ladder, the foot of the evaluator is stuck with a reflective sticker, and the Optitrack tracks the reflective system on the foot of the evaluator to track the foot motion of the evaluator.
In this embodiment, another technical scheme of physical fitness is as follows:
nine palace lattice for physical ability
1. The technical scheme is as follows: the Unity program divides 9 areas according to the middle part of the ground area, the icon appears randomly, the icon appears faster and faster, and the more the user uses football to trigger the icon, the higher the score and the better the physical ability.
2. When testing the agile ladder, the foot of the evaluator is stuck with a reflective sticker, and the Optitrack tracks the reflective system on the foot of the evaluator to track the foot motion of the evaluator.
The testing environment and atmosphere of the application are realized by the projection system, and the projection system has the advantages that the light is softer, so that a tester can have safer and more visual friendly environment in the testing process. The ground is a real lawn, so that a tester can obtain buffering when the tester possibly falls down while having experience of combining deficiency and excess.
The application adopts 8 Optigrack to integrate and capture the motion trail of the athlete and the motion trail of the football. Delay control can be controlled within 20 milliseconds, and is a wearable motion capture and interaction solution with ultra-low delay on the market. First, interactive retroreflective soccer. The football was designed to reflect light and the origin data was captured using 8 Optitrack integration. Second, the interactive reflective sticker is stuck to the position of the footstep, which can be captured by the reflective sticker of 1.5xm 1.5cm stuck to the tip of the foot, so as to realize the interactive icons in the position and space of the sticker. Thirdly, the interactive digital interactive bar is designed into a rigid body interactive bar consisting of 9 reflection points, and identification and three-bit mapping interaction of user ID can be realized.
The evaluation analysis generated by the application comprises the correlation calculation of the interactive hit number and the tracking of the target moving track. Can be displayed at three ends together: applet, game client, game server.
The technical index of the application is evaluated by completing the number of the interactable targets, and the technical index is the application of the technical index. When the skill is evaluated, the interactable icons are enabled to appear at the same time, and a tester needs to select which interactable icons to interact with through strategy judgment to obtain higher results.
While the application has been described in detail in the foregoing general description and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the application and are intended to be within the scope of the application as claimed.
Claims (8)
1. The football evaluation method based on the motion capture technology is characterized by comprising the following steps of:
acquiring track information and football information of the athlete captured by the football evaluation system when the athlete interacts with the football evaluation system;
acquiring virtual imaging information generated by a football evaluation system when an athlete interacts with the football evaluation system;
evaluating and analyzing according to the track information of the athlete, the football information and the virtual imaging information;
the evaluating and analyzing according to the athlete track information, football information and virtual imaging information comprises the following steps:
acquiring shooting Icon position information in the virtual imaging information;
acquiring football position information in football sport information;
acquiring shooting precision information according to the football position information and the shooting Icon position information;
the shooting precision information obtained according to the football position information and the Icon position information is obtained by adopting the following formula:
wherein,,
r i radius of Icon; d (D) s,i Is weight information;
the D is s,i The method is obtained by adopting the following formula:
wherein,,
(x' 3 ,y' 3 ,z' 3 ) Representing the projection position of the football on the plane of Icon;
(x o,i ,y o,i ,z o,i ) Indicating the center position of Icon.
2. The motion capture technology-based soccer evaluation method of claim 1, wherein the performing evaluation analysis based on the player trajectory information, soccer motion information, and virtual imaging information further comprises:
acquiring the position information of a disc zone Icon in the virtual imaging information;
acquiring football position information in football sport information;
and obtaining the tape precision information according to the tape Icon position information in the virtual imaging information and the football position information in the football sport information.
3. The method for evaluating a soccer ball based on motion capture technology according to claim 2, wherein the obtaining the precision information of the tape according to the position information of the tape Icon in the virtual imaging information and the position information of the soccer ball in the soccer ball comprises:
judging whether the position of the football position information is overlapped with the position information of the disc strip Icon at any time point in the preset time or not in the preset time, if so, then
The overlay accuracy information is acquired as the tape accuracy information.
4. The motion capture technology-based soccer evaluation method of claim 3, wherein the performing evaluation analysis based on the player trajectory information, soccer motion information, and virtual imaging information further comprises:
acquiring passing Icon position information in the virtual imaging information;
acquiring football position information and football track information in football information;
and acquiring pass evaluation information according to the position information of the disc belt Icon, the football position information and the football motion track information in the virtual imaging information.
5. The method for evaluating soccer based on motion capture technology as in claim 4, wherein said obtaining pass evaluation information based on the position information of the reel Icon, the position information of the soccer ball, and the track information of the soccer ball in the virtual imaging information comprises:
acquiring the actual motion speed of the football according to the football motion track information;
acquiring the accuracy of the football direction according to the position information of the coil Icon, the football position information and the football track information;
acquiring the accuracy of the passing speed according to the actual motion speed of the football and a preset optimal speed;
and acquiring pass evaluation information according to the pass speed accuracy and the football direction accuracy.
6. The motion capture technology-based soccer evaluation method of claim 5, wherein the performing evaluation analysis based on the player trajectory information, soccer motion information, and virtual imaging information further comprises:
acquiring physical ability Icon position information in the virtual imaging information;
acquiring track information of athletes;
acquiring the actual speed information and the actual movement distance information of the athlete according to the athlete track information and the physical ability Icon position information;
obtaining a physical stamina evaluation table, wherein the physical stamina evaluation table comprises a plurality of pieces of preset athlete speed information, a plurality of pieces of preset distance information, speed value information and distance value information, each piece of preset athlete speed information corresponds to one piece of speed value information, and each piece of preset distance information corresponds to one piece of distance value information;
acquiring speed value information corresponding to preset athlete speed information which is the same as the athlete actual speed information;
acquiring distance value information corresponding to preset distance information which is the same as the actual distance information of the athlete;
and acquiring physical energy value information according to the acquired speed value information and the distance value information.
7. The motion capture technology-based soccer evaluation method of claim 6, wherein the performing evaluation analysis based on the player trajectory information, soccer motion information, and virtual imaging information further comprises:
and acquiring comprehensive evaluation information of the athlete according to the shooting precision information acquired many times, the disc belt precision information acquired many times, the pass evaluation information acquired many times and the physical ability value information acquired many times.
8. The football evaluation system based on the motion capture technology is characterized by comprising a trackable football, trackable football shoes, a projection system, an infrared tracking system and a master controller; the master controller is respectively connected with the projection system and the infrared tracking system; wherein,,
the projection system is used for projecting virtual imaging information;
the infrared tracking system is used for tracking the position of the trackable football, the trackable football shoes and virtual imaging information and transmitting the tracked information to the master controller;
the master controller is used for evaluating and analyzing by adopting the football evaluating method according to any one of claims 1 to 7 according to the acquired information.
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